sanding soft wood/finish finish prep questions.

fenderchamp

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I have a body that I want to finish. It a piece pine body that I bought off of Ebay, it's super light and spalted and I think it will make a cool body. (I'll post some pictures below).

I've made some tele bodies out of old salvaged pine that I love, I finished them with boiled linseed oil, topped with Behlen's nitro clear laquer ('ll post some picture below too). I like how they came out. I want to do the same thing with this pine body.

Where I'm hesitating is that this body has really wide grain, like it grew really fast, the old salvaged pine bodies have extremely tight multiple grain lines, I'm afraid that I'll mess this body up, sanding it. It really pretty rough, particularly around the edges. I'm worried about getting that ripple to the wood, because of the contrasting density of the grain, I've had problems and seen problems that others have had sanding some Cyprus, Pauwalonia, and even really punky swamp ash in the past with 220. I tried to use a palm sander with a thin rubber pad over the block.

I did another pine body, similar to this one, another new growth, light 1 piece body, and finished it in clear, and I don't remember it being an issue, but I don't really recall any details about finishing and/or assembling that guitar for some reason, I guess I did that right after I had some fairly profound trauma in my life, and I seem to not recall many details from around then, not that I was inebriated or anything like that, I just can't really recall working on that body at all.

I'm thinking about simply sanding the oil into it with wet dry paper, and wet sanding it like that so to speak with the oil, using maybe a small rubber eraser as a block with some 220 on the edges, and using a bigger block and 400 on the front and back. I've applied linseed oil with emery paper before, and it seems to work ok.

Any suggestions, etc are very much welcome Please, please, please!

See picture below in a minute.
 
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fenderchamp

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The new body
 

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fenderchamp

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My salvage pine bodies
 

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Beebe

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Use a hard block when you sand and you shouldn't end up with ripples. The rubber pencil eraser should be hard enough. I like using them as well.

Looks like this one has a small vintage style rollover radius on the body. Don't sand too much. You want to keep the rollovers uniform and not change the shape of the guitar at all.

Just sand to freshen it up and fix roughness with filler.

I've attempted to grain fill pine by sanding with linseed oil. Unless you are adding additional wood dust, I don't think you can make enough slurry to fill the grain without removing too much wood.

So I recommend getting or making some some pine dust/flour. And mixing it with the BLO to make a filler.

Let it sit on the surface and wipe it off against the grain before it cures. Let it cure over night (Edit: assuming the BLO has driers added), then repeat until the grain is filled.

You can also add clear pigments to the linseed oil to help fill. I've used a clear mica that also added a nice sheen.

Pumice I believe is clear in linseed oil, so this cold work as the clear pigment... Just double check on that. I haven't tried this yet.
 
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